We grew this business with the store operators and the merchants making all the decisions, I got to be one of the merchants and it was a lot of fun. But to put the customer in charge, you have to start with design.

There's only so much we can do from the home office [Walmart headquarter] to merchandise a store well. If you live in that community and work in that store, you know more about what you should be featuring and the actionality on an end cap than someone from Bentonville, Arkansas does.

I think that people that shop Walmart frequently and love the brand the most find it very natural to come to us first for e-commerce. But for others that may shop around or not have chosen to shop at Walmart in the past, you get what you earn, and our opportunity to earn their business starts with winning their grocery and consumables basket.

The only thing I really think about is: How are we making decisions and getting things done such that Walmart is succeeding and creating value 50 years from now?

It can improve the customer experience if ads are done in the right way and we also want to make sure that we don't do anything that causes our prices to go up in our retail business.

I think you can love more than one child, and we've got to do all these at once. I think there's a store inventory opportunity for us and buying and selling merchandise is hard, by the way. There's a lot of people here that have been doing it for a long time and they're good at it, thankfully, but it's not easy.