Leases (Tables)

12 Months Ended

Dec. 31, 2014

Leases [Abstract]

Summary of net rental expense for operating leases

The following table is a summary of the Company’s net rental expense for operating leases for the years ended December 31:

In millions	2014			2013			2012
Minimum rentals	$	2,320		$	2,210		$	2,165
Contingent rentals	36			41			48
	2,356			2,251			2,213
Less: sublease income	(21		)	(21		)	(20		)
	$	2,335		$	2,230		$	2,193

Summary of future minimum lease payments under capital and operating leases

The following table is a summary of the future minimum lease payments under capital and operating leases as of December 31, 2014:

In millions	Capital Leases			Operating Leases(1)
2015	$	47		$	2,279
2016	47			2,220
2017	47			2,121
2018	48			2,007
2019	48			1,861
Thereafter	573			16,794
Total future lease payments	810			$	27,282
Less: imputed interest	(419		)
Present value of capital lease obligations	$	391

(1) Future operating lease payments have not been reduced by minimum sublease rentals of $203 million due in the future under noncancelable subleases.