Employee Benefits - Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 2,243
Fair value of plan assets at end of year	2,231	$ 2,243
Amounts recognized in consolidated balance sheets:
Non-current assets	359	297
Non-current liabilities	(262)	(291)
Retirement Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Net benefit obligation at beginning of year	2,220	1,945
Service cost	4	4	$ 3
Interest cost	40	52	64
Plan participants’ contributions	0	0
Actuarial loss	(55)	269
Gross benefits paid	(77)	(76)
Foreign currency effect	(10)	26
Other adjustments	0	0
Net benefit obligation at end of year	2,122	2,220	1,945
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	2,243	1,960
Actual return on plan assets	58	327
Employer contributions	11	12
Plan participants’ contributions	0	0
Gross benefits paid	(77)	(76)
Foreign currency effect	(4)	20
Fair value of plan assets at end of year	2,231	2,243	1,960
Funded status	109	23
Amounts recognized in consolidated balance sheets:
Non-current assets	359	297
Current liabilities	(10)	(10)
Non-current liabilities	(240)	(264)
Total amounts recognized in consolidated balance sheets	109	23
Accumulated benefit obligation	2,110	2,204
Plans with accumulated benefit obligation in excess of the fair value of plan assets:
Projected benefit obligation	250	274
Accumulated benefit obligation	238	258
Fair value of plan assets	0	0
Amounts recognized in accumulated other comprehensive loss, net of tax:
Net actuarial loss (gain)	350	373
Prior service credit	2	2
Total recognized	352	375
Postretirement Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Net benefit obligation at beginning of year	36	38
Service cost	0	0	0
Interest cost	1	1	1
Plan participants’ contributions	2	2
Actuarial loss	(2)	1
Gross benefits paid	(5)	(6)
Foreign currency effect	0	0
Other adjustments	(4)	0
Net benefit obligation at end of year	28	36	38
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	9	13
Actual return on plan assets	0	0
Employer contributions	0	0
Plan participants’ contributions	2	2
Gross benefits paid	(5)	(6)
Foreign currency effect	0	0
Fair value of plan assets at end of year	6	9	$ 13
Funded status	(22)	(27)
Amounts recognized in consolidated balance sheets:
Non-current assets	0	0
Current liabilities	0	0
Non-current liabilities	(22)	(27)
Total amounts recognized in consolidated balance sheets	(22)	(27)
Amounts recognized in accumulated other comprehensive loss, net of tax:
Net actuarial loss (gain)	(36)	(37)
Prior service credit	(14)	(12)
Total recognized	$ (50)	$ (49)