Leased Assets (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Future Minimum Rental Payments

  At December 31, 2018, future minimum rental payments applicable to non‑cancelable operating leases with remaining terms in excess of one year (other than oil and gas property leases) are as follows (in millions):

2019	$	355
2020	156
2021	65
2022	64
2023	64
Remaining years	198
Total Minimum Lease Payments		902
Less: Income from subleases	114
Net Minimum Lease Payments	$	788

Rental Expense

Rental expense was as follows:

	2018		2017		2016
	(In millions)
Total rental expense	$	154	$	123	$	106
Less: Income from subleases	8		10		5
Net Rental Expense	$	146	$	113	$	101