Goodwill and Intangible Assets - Analysis of goodwill and intangible assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Goodwill, beginning of year	$ 342	$ 345
Goodwill, acquisitions	0	8
Goodwill, impairment	(2)
Goodwill, foreign currency translation adjustment	5	(11)
Goodwill, end of year	345	342	$ 345
Intangible assets (indefinite life)
Intangible assets with an indefinite life, beginning of year	69	71
Intangible assets with an indefinite life, acquisitions	0	0
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)	0
Intangible assets with an indefinite life, foreign currency translation adjustment	1	(2)
Intangible assets with an indefinite life, end of year	70	69	71
Intangible assets (finite life)
Intangible assets with a finite life, beginning of year	393	529
Intangible assets with a finite life, acquisitions	11	0
Intangible assets with a finite life, amortization	(95)	(106)	(82)
Intangible assets with a finite life, impairment	0
Intangible assets with a finite life, foreign currency translation adjustment	7	(30)
Intangible assets with a finite life, end of year	316	393	529
Total
Goodwill and intangible assets, beginning of year	804	945
Goodwill and intangible assets, acquisitions	11	8
Goodwill and intangible assets impairment	(2)
Goodwill and intangible assets, foreign currency movements and other adjustments	13	(43)
Goodwill and intangible assets, end of year	731	804	945
Goodwill and intangible assets, gross balance	1,523
Intangible assets with a finite life, accumulated amortization	(766)	(677)
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments	(26)	(42)
Goodwill and intangible assets	731	804	$ 945
Goodwill
Goodwill
Goodwill, end of year	345
Total
Goodwill and intangible assets, beginning of year	342
Goodwill and intangible assets, end of year	345	342
Goodwill, gross balance	348
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments	(3)	(9)
Goodwill and intangible assets	345	$ 342
Intangible assets with an indefinite life
Intangible assets (indefinite life)
Intangible assets with an indefinite life, end of year	70
Total
Indefinite-lived intangible assets, gross balance	70
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments	0
Intangible assets with a finite life
Intangible assets (finite life)
Intangible assets with a finite life, end of year	316
Total
Intangible assets with a finite life, gross balance	1,105
Intangible assets with a finite life, accumulated amortization	(766)
Goodwill and intangible assets, accumulated foreign currency translation and other adjustments	$ (23)