Business Segments - Segment Assets (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets		$ 21,617	$ 16,506
Operating Segments
Segment Reporting Information [Line Items]
Assets		18,784	14,216
Operating Segments | Americas
Segment Reporting Information [Line Items]
Assets		10,092	6,666
Operating Segments | Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Assets		5,639	4,825
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Assets		3,053	2,725
Corporate
Segment Reporting Information [Line Items]
Assets	[1]	$ 2,833	$ 2,290

[1] Corporate includes substantially all of our U.S. net deferred tax assets.