Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Lease, Cost [Table Text Block]

	Three Months Ended   March 31, 2019
	(Millions)
Lease Cost:
Operating lease cost	$	10
Short-term lease cost	—
Variable lease cost	6
Sublease income	(1		)
Total lease cost	$	15
Cash paid for amounts included in the measurement of operating lease liabilities	$	9
	March 31, 2019
	(Millions)
Other Information:
Right-of-use asset (included in Regulatory assets, deferred charges, and other in our Consolidated Balance Sheet)	$	223
Operating lease liabilities:
Current (included in Accrued liabilities in our Consolidated Balance Sheet)	$	25
Noncurrent (included in Regulatory liabilities, deferred income, and other in our Consolidated Balance Sheet)	$	198
Weighted-average remaining lease term – operating leases (years)	12
Weighted-average discount rate – operating leases	4.62%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

As of March 31, 2019, the following table represents our operating lease maturities, including renewal provisions that we have assessed as being reasonably certain of exercise, for each of the years ended December 31:

	(Millions)
2019 (remainder)	$	27
2020	32
2021	32
2022	27
2023	19
Thereafter	165
Total future lease payments	302
Less amount representing interest	79
Total obligations under operating leases	$	223