Leases (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Leases
2020	$ 40
2021	40
2022	40
2023	36
2024	29
Thereafter	154
Total lease payments	339
Less imputed interest	(66)
Total net present value	273
Finance Leases
2020	20
2021	17
2022	15
2023	8
2024	4
Thereafter	16
Total lease payments	80
Less imputed interest	(20)
Total net present value	60
Total
2020	60
2021	57
2022	55
2023	44
2024	33
Thereafter	170
Total lease payments	419
Less imputed interest	(86)
Total net present value	333
Sublease income	$ 13
Sublease income term	13 years