Employee Benefit Plans - Schedule of Defined Benefit Plan Disclosures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans	$ 8	$ 7	$ 28	$ 25
Defined contribution plans	12	10	42	31
Multi-employer pension plans	46	39	119	117
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	8	30	25
Interest cost	4	5	12	16
Expected return on plan assets	(6)	(5)	(19)	(17)
Amortization of prior service credit	0	0	0	(1)
Recognized actuarial net loss	4	2	11	7
Net settlement and curtailment loss	0	0	0	1
Total net periodic benefit cost	12	10	34	31
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Total net periodic benefit cost	$ 1	$ 1	$ 1	$ 1