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Revision of Prior Period Financial Statements - Schedule of Consolidated Cash Flow Statements (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
OPERATING ACTIVITIES                      
Net Earnings $ 963 [1] $ 880 [1] $ 882 $ 828 $ 984 [2] $ 974 [3] $ 1,843 [2] $ 1,958 [2] $ 2,786 $ 3,668 $ 4,114
Depreciation and Amortization 410   405 403 404 [2] 395 820 [2] 799 [4] 1,202 1,607 1,502
Deferred Income Taxes   7       31 14 [4] 70 [4] 97 126 100
Other Operating Activities   (16)       (35) (10) [4] 18 [4] 67 (7) (16)
Changes in Other Current Assets           (73) 25 [4] (106) [4] (84) (112) (24)
Changes in Income and Other Taxes Payable           266 (403) [4] 33 [4] 267 430 88
Changes in Other Current Liabilities           (301) (46) [4] (267) [4] (271) (196) 5,526
Net Cash Provided by Operating Activities   1,066       1,256 2,173 [4] 2,473 [4] 4,025 5,514  
INVESTING ACTIVITIES                      
Property Additions   (517)       (432) (1,066) [4] (997) [4] (1,571) (2,257) (2,113)
Proceeds and Advances from Property Dispositions   11       17 43 [4] 52 [4] 65 88 294
Net Cash Used In Investing Activities   (486)       (460) (1,048) [4] (945) [4] (1,506) (2,227) (2,063)
Net Decrease in Cash and Cash Equivalents           (642) (115) [4] (977) [4] (573) (580) (306)
CASH AND CASH EQUIVALENTS                      
Cash and Cash Equivalents at Beginning of Period   1,353 [5] 1,360 956 [4] 1,291 1,933 [4] 1,353 [5] 1,933 [4] 1,933 [4] 1,933 [4] 2,239
Cash and Cash Equivalents at End of Period $ 1,238 [4]   1,353 [5] 1,360 956 [4] 1,291 1,238 [4] 956 [4] 1,360 1,353 [5] 1,933 [4]
As Previously Reported                      
OPERATING ACTIVITIES                      
Net Earnings   893 886 846 996 987   1,983 2,829 3,715 4,166
Depreciation and Amortization     417 399 402 393   795 1,194 1,611 1,500
Deferred Income Taxes   11       35   78 111 140 117
Other Operating Activities   (15)       (31)   23 69 (5) (17)
Changes in Other Current Assets           (72)   (105) (86) (120) (22)
Changes in Income and Other Taxes Payable           266   33 267 431 113
Changes in Other Current Liabilities           (326)   (292) (296) (221) 5,619
Net Cash Provided by Operating Activities   1,084       1,251   2,483 4,049 5,549  
INVESTING ACTIVITIES                      
Property Additions   (524)       (443)   (1,015) (1,590) (2,281) (2,133)
Proceeds and Advances from Property Dispositions   0       8   35 35 52 246
Net Cash Used In Investing Activities   (504)       (480)   (980) (1,555) (2,287) (2,131)
Net Decrease in Cash and Cash Equivalents           (667)   (1,002) (598) (605) (281)
CASH AND CASH EQUIVALENTS                      
Cash and Cash Equivalents at Beginning of Period   1,353 1,360 956 1,291 1,958 1,353 1,958 1,958 1,958 2,239
Cash and Cash Equivalents at End of Period     1,353 1,360 956 1,291   956 1,360 1,353 1,958
Adjustment                      
OPERATING ACTIVITIES                      
Net Earnings   (13) (4) (18) (12) (13)   (25) (43) (47) (52)
Depreciation and Amortization     (12) 4 2 2   4 8 (4) 2
Deferred Income Taxes   (4)       (4)   (8) (14) (14) (17)
Other Operating Activities   (1)       (4)   (5) (2) (2) 1
Changes in Other Current Assets           (1)   (1) 2 8 (2)
Changes in Income and Other Taxes Payable           0   0 0 (1) (25)
Changes in Other Current Liabilities           25   25 25 25 (93)
Net Cash Provided by Operating Activities   (18)       5   (10) (24) (35)  
INVESTING ACTIVITIES                      
Property Additions   7       11   18 19 24 20
Proceeds and Advances from Property Dispositions   11       9   17 30 36 48
Net Cash Used In Investing Activities   18       20   35 49 60 68
Net Decrease in Cash and Cash Equivalents           25   25 25 25 (25)
CASH AND CASH EQUIVALENTS                      
Cash and Cash Equivalents at Beginning of Period   $ 0 0 0 0 (25) $ 0 (25) (25) (25) 0
Cash and Cash Equivalents at End of Period     $ 0 $ 0 $ 0 $ 0   $ 0 $ 0 $ 0 $ (25)
[1] See Note 11, Revision of Prior Period Financial Statements.
[2] See Note 11, Revision of Prior Period Financial Statements.
[3] See Note 11, Revision of Prior Period Financial Statements.
[4] See Note 11, Revision of Prior Period Financial Statements.
[5] See Note 11, Revision of Prior Period Financial Statements.