Pension Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost Table

The following summarizes the Company’s pension and other postretirement benefit cost:

	Pension Benefits						Other Benefits
millions	2016			2015			2016			2015
Three Months Ended September 30
Service cost	$	24		$	30		$	1		$	3
Interest cost	24			25			3			3
Expected return on plan assets	(24		)	(27		)	—			—
Amortization of net actuarial loss (gain)	12			13			—			—
Amortization of net prior service cost (credit)	—			—			(6		)	1
Settlement expense	102			—			—			—
Net periodic benefit cost	$	138		$	41		$	(2	)	$	7
Nine Months Ended September 30
Service cost	$	73		$	89		$	2		$	8
Interest cost	73			76			9			11
Expected return on plan assets	(75		)	(82		)	—			—
Amortization of net actuarial loss (gain)	30			39			—			—
Amortization of net prior service cost (credit)	—			—			(18		)	2
Settlement expense	126			—			—			—
Termination benefits expense	44			—			—			—
Curtailment expense	8			—			—			—
Net periodic benefit cost	$	279		$	122		$	(7	)	$	21