Pension Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost, before tax	$ 3
Unrecognized prior service cost, after tax	3
Unrecognized actuarial losses, before tax	97
Unrecognized actuarial losses, after tax	74
Future actuarial losses, before tax	4
Future actuarial losses, after tax	$ 3
Number of days prior written notice to redeem investments	90 days
Compensation expense recognized for 401(k)	$ 63	$ 53	$ 45
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	1.50%	1.75%	1.75%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.00%	6.00%	6.00%
Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	3.50%	3.48%	3.54%
Current fiscal year contributions	$ 11
Expected contributions, defined benefit pension plans, next fiscal year	$ 10
U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	5.75%	5.75%	5.75%
Expected contributions, defined benefit pension plans, next fiscal year	$ 1