As it relates to brick-and-mortar, we've seen it all and done it all. We operate around the world in different formats, different brands. We've got large stores, small stores, all these different formats. So we know that space pretty well, but the e-commerce business was different.

One of the biggest areas of change in the last decade is related to associates that work in our stores, picking orders for delivery and pickup for our customers. And we have something north of 200,000 people doing that job, and yet we have about the same (total) number of people working in Walmart U.S.

As I look across our company, we have everything from store associates to supply chain associates. Of the 2.1 million people (globally), something less than 75,000 of them are home office jobs. All the other ones are working in a store, a club, a distribution center. And I think those jobs change more gradually. We are still going to want to serve customers and members with people. The change as it relates to the home office jobs probably happens faster.

If you're changing the world, you're working on important things. You're excited to get up in the morning.

Don't change on me. Don't extort me unless you intend to do it forever.

People say sometimes, "You work in the fastest-moving industry in the world." I don't feel that way. I think I work in one of the slowest. It seems to take forever to get anything done.