Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The following tables provide the components of net periodic benefit cost (in millions):

	Pension Benefits						Retiree Medical and Other Benefits
Three Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	1		$	1		$	—		$	—
Interest cost	186			164			15			13
Expected return on assets	(197		)	(180		)	(5		)	(4		)
Settlements	1			—			—			—
Amortization of:
Prior service cost (benefit)	7			7			(55		)	(61		)
Unrecognized net loss (gain)	12			23			(2		)	(2		)
Net periodic benefit cost	$	10		$	15		$	(47	)	$	(54	)

	Pension Benefits						Retiree Medical and Other Benefits
Nine Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	3		$	3		$	1		$	—
Interest cost	557			490			46			39
Expected return on assets	(589		)	(540		)	(15		)	(12		)
Settlements	4			—			—			—
Amortization of:
Prior service cost (benefit)	21			21			(175		)	(183		)
Unrecognized net loss (gain)	35			69			(6		)	(6		)
Net periodic benefit cost	$	31		$	43		$	(149	)	$	(162	)

AA [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

The following tables provide the components of net periodic benefit cost (in millions):

	Pension Benefits						Retiree Medical and Other Benefits
Three Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	1		$	1		$	—		$	—
Interest cost	185			164			14			13
Expected return on assets	(196		)	(180		)	(5		)	(4		)
Settlements	1			—			—			—
Amortization of:
Prior service cost (benefit)	7			7			(54		)	(61		)
Unrecognized net loss (gain)	12			23			(2		)	(2		)
Net periodic benefit cost	$	10		$	15		$	(47	)	$	(54	)

	Pension Benefits						Retiree Medical and Other Benefits
Nine Months Ended September 30,
	2014			2013			2014			2013
Service cost	$	2		$	3		$	—		$	—
Interest cost	554			490			42			39
Expected return on assets	(587		)	(540		)	(15		)	(12		)
Settlements	4			—			—			—
Amortization of:
Prior service cost (benefit)	21			21			(172		)	(183		)
Unrecognized net loss (gain)	35			69			(6		)	(6		)
Net periodic benefit cost	$	29		$	43		$	(151	)	$	(162	)