XML 125 R101.htm IDEA: XBRL DOCUMENT v3.8.0.1
Schedule of Effect of Four Quarters Events (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating:                      
Severance and benefit costs $ 15 $ 23 $ 41 $ 37 $ 10 $ 13 $ 6 $ 8 $ 116 $ 37 $ 107
Impairment of assets 10 15         412   25 412 79
(Gains) losses on sale of assets and other special charges 6 12 3 14 19 18 6 8 35 51 122
Total operating special charges 31 50 44 51 (31) 45 434 190 176 638 326
Labor agreement costs and related items         (60) 14 10 100   64 18
Income taxes:                      
Income tax benefit related to special charges (11) (18) (16) (18) 12 (16) (153) (72) (63) (229) (11)
Income tax adjustments (Note 7) (192)       180       (192) 180 (3,130)
Total operating and nonoperating special charges, net of income taxes and income tax adjustments (172) 32 28 33 161 29 272 126 (79) 588 (2,613)
Cleveland airport lease restructuring               74   74  
Severance and benefit costs 15 23 41 37 10 13 6 8 116 37 107
Impairment of assets 10 15         412   25 412 79
(Gains) losses on sale of assets and other special charges 6 12 3 14 19 18 6 8 35 51 122
Total operating special charges 31 50 44 51 (31) 45 434 190 176 638 326
Nonoperating income (expense):                      
Losses (gain) on extinguishment of debt and other             (9) 8   (1) 202
Income tax expense (benefit) related to special charges (11) (18) (16) (18) 12 (16) (153) (72) (63) (229) (11)
Income tax adjustments (Note 6) (192)       180       (192) 180 (3,130)
Total operating and nonoperating special charges, net of income taxes and income tax adjustments $ (172) $ 32 $ 28 $ 33 $ 161 $ 29 $ 272 $ 126 $ (79) $ 588 $ (2,613)