Debt	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Debt	DebtIn August of 2023, we repurchased $150 million aggregate principal amount of various maturities of our outstanding debt, including: $15 million of our 3.8% senior notes due November 2025, $14 million of our 6.75% notes due February 2027, $21 million of our 6.7% senior notes due September 2038, $32 million of our 7.45% senior notes due September 2039, $60 million of our 5.0% senior notes due November 2045, and $8 million of our 7.6% senior debentures due August 2096. We used cash on hand to fund these repurchases, which included the principal amount, a net premium and accrued interest. The remaining principal balance ($4.5 billion in the aggregate) of each of these debt instruments remains outstanding.