Segment Information - Total Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Assets
Total assets:	$ 8,877	$ 8,832	$ 8,825
Reportable Segment Totals
Assets
Total assets:	8,475	8,366	8,291
Americas
Assets
Total assets:	5,097	4,853	4,755
Europe
Assets
Total assets:	3,378	3,513	3,536
Other
Assets
Total assets:	$ 402	$ 466	$ 534