Rental Expense and Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2014

Rental Expense and Lease Commitments

Lease Commitments

($ in millions)
			2015		2016		2017		2018		2019		Beyond 2019
Operating lease commitments
	Gross minimum rental commitments
		(including vacant space below)	$	1,350	$	1,161	$	988	$	848	$	754	$	1,051
	Vacant space		$	24	$	9	$	6	$	2	$	0	$	—
	Sublease income commitments		$	12	$	10	$	8	$	6	$	5	$	6
Capital lease commitments			$	13	$	7	$	2	$	2	$	2	$	2