Supplemental disclosures of cash flow information and non-cash investing and financing activities for the years ended December 31 are as follows (in millions):


2014	UAL		United
Cash paid (refunded) during the period for:
Interest (net of amounts capitalized)	$	748	$	748
Income taxes		(16)		(16)
Non-cash transactions:
Net property and equipment acquired through issuance of debt	$	1,114	$	1,114
Airport construction financing		14		14
Exchanges of certain 4.5% Notes and 6% Convertible Senior Notes for common stock		260		156
Transfer of UAL subsidiaries to United		—		186

2013
Cash paid (refunded) during the period for:
Interest (net of amounts capitalized)	$	752	$	752
Income taxes		(20)		(15)
Non-cash transactions:
Net property and equipment acquired through issuance of debt	$	229	$	229
Airport construction financing		40		40
Exchanges of certain 6% Convertible Senior Notes for common stock		240		—

2012
Cash paid during the period for:
Interest (net of amounts capitalized)	$	766	$	766
Income taxes		2		4
Non-cash transactions:
Net property and equipment acquired through issuance of debt	$	544	$	544
8% Contingent Senior Notes and 6% Senior Notes due 2031, net of discount		357		357
Special facility payment financing		101		101
Airport construction financing		50		50